Apparatus for making molds.



PATENTED DEG. 15, 1903A.

s. Woon. APPARATUS POR MAKING MOL'DS APPLICATION FILED NOV. 22, 1902.

HO MODEL.

Uivirnp` Fratrie Patented December 15, 1903 .maar trier.

WILLIAM S. WOOD, OF CHICAGO, ILLINOIS, ASSIGNOR OF THREE-FOURTHS TO SARAS. HARRIS, OF CHICAGO, ILLINOIS.

APPARATUS FOR MAKING MOLDS.

SPECIFICATION forming part of Letters Patent No. 747,289, dated December15, 1903.

Application led November 22, 1902. Serialllo. 132,413. (No model.)

T a/ZZ whom, t may concern:

Be it known that I, WILLIAM S. WOOD, a citizen of the United States,residing at Chicago, in the county of Cook and State ofIllinois,haveinvented certain new and usefulImprovements in Apparatusfor Making Molds, of which I do declare the following to be a full,clear, and exact description, reference being had to the accompanyingdrawings, forming Io part of this specication.

The invention relates to molding apparatus,

and seeks to provide a simple and effective reversible moldingapparatus,which is preferably portable,whereby molds for castings may I5be quickly and conveniently made; and the invention consists in thefeatures ot' construction, arrangements, and combinations of partshereinafter described, illustrated in the accompanying drawings, andmore particularly pointed out in the appended claims.

In the drawings, Figure l is a vertical section of the improvedapparatus in position with the flask filled with sand. Fig. Zisa similarView with the position of the parts reversed and with the patterns drawnfrom the mold. Fig. 3 is a detail inverted plan view of thestripping-plate. Fig. Aisan inverted plan view of the pattern or mainsupporting plate.

The improved apparatus comprises a l'lat reversiblestripping-plateiadapted to lit over the open side of the flask G. W'henthe parts are in position for ramming the sand into the flask G, thelatter is mounted upon the stripping-plate A, (see Fig. 1,) and in orderthat the flask may be placed in proper position it is provided with keysg, adapted 'to enter suitable holes d5 (see Fig. 3) in opposite ends ofthe stripping-plate A.

The reversible stripping-plate A is pro- 4o vided with openings a3,which conform in outline to the particular pattern employed and throughwhich the patterns may be projected. If the pattern is gated, theseparate openings @sare connected by'a slot a4, through which the gateof the pattern extends. In order that the stripping-plate may bereadilvadapted for use in connection with diierent patterns, the openings a3are preferably formed in a bodily-removable rectangular 5o section A,which tits Within a central rectangular opening in the main' body of thestripping-plate A. The edges of the section A and the edges of theopening in the stripping-plate are rabbeted, as shown, and the section Ais removably held in place by screws co2. For convenience in reversingthe apparatus stripping-plate A is provided with laterally-extendinghandles A2, which may be readily grasped by the molder.

The main or pattern-supporting plate B is 6o connected to thestripping-plate A and is reversible therewith. This supporting-plate ispositioned against the face of the strippingplate A and extends over theopenings as therein. Besides being reversible lwith the stripping-plateA the supporting-plate B is movable laterally to and from thestrippingplate A and at right angles thereto to draw the pattern. Toinsure the right-line movement ol the pattern-supporting plate B and 7oto assistthe melder in drawing the patterns Without damage to the molds,laterally-projecting guide-pins ct are xed to the stripping-plate A, andsleeves ZJ, surrounding theV pins d, are fixed to the pattern-supportingplate B.

The patterns C (which in this instance are separate halves of a pulley)are fixed to the supporting-plate B and extend through the openings a3in the stripping-plate A. 'Pref- 8o erably platesA or mounts D for thepatterns are interposed between the supporting-plate B and the patternsC, which are equal in size to the openings a3 in the strippingplate Aand which are equal in thickness to the stripping-plate. The patternsare usually connected by a gate c, which extends through the slot a4 inthe stripping-plate.

The patterns C are preferably xed to a rectangular bodily-removablesection B', set '9o within a central rectangular opening in thesupporting-plate B. `The edges of the opening and the edges of theremovable section B are rabbeted, and the latter is removably held inplace by screws b2. (See Fig. ll.)

When the sand is rammed, into the mold, the apparatusis placed in theposition shown in Fig. l, with the main supporting-plate B resting upona pair of suitable cross bars or stringere F or otherwise rigidlymounted, so roo that the stripping-plate A and llask G may be supportedthereby in convenient position,

so that the patterns C, which are secured directly to thesupporting-plate B, are firmly held in position during the rammingoperation. As soon as the flask is filled with sand packed about thepatterns C the bottom board G is placed upon the fiask and the apparatusreversed into the position shown in Fig. 2. The patterns may then beeasily and quickly drawn without damaging the molds by shifting thesupporting-plate B at right angles to the stripping plate, the movementof the stripping-plate being accurately guidedby the pins 0,. By thusreversing the apparatus all danger of parts of the mold falling out whenthe pattern is drawn isobviated.

For drawing the pattern the supportingplate B is preferably providedwith a handle B2, rigidly secured thereto, which may be grasped by theoperator with one hand as he taps the supporting-plate with a hammer orpiece of iron held in the other hand. In this manner the operator isable to feel, as it were, the instant the pattern separates from thesand and is able to regulate the drawing of the pattern more eectivelythan ifany mechanical device, such as a screw or lever, were employed toshift the su pporting-plate B. It will also be observed that as thepatterns commence t0 move from the molds the supporting-plate B isagainst the face of the stripping-plate A and close to the fixed ends ofthe guide-pins a, so that at the instant the patterns start from themold the supportingplate B is securely held by pinsv a against anylateral shift.

Preferably stops E are adj ustably threaded upon the ends of theguidepins a and are held in adjusted position by lock-nuts E', so thatwhen the patterns have been entirely lifted from the molds, as indicatedin Fig. 2, the sleeves b upon the supporting-plate B will engage thestops E, and the further movement of the supporting-plate will lift thestripping-plate A clear of the flask and of the mold therein.

`While the present invention is particularly designed as a portableapparatus for benchwork, changes could be made in the arrangement ofparts and details of structure without departure from the essentials ofthe invention.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

1. A portable, reversible molding apparatus comprising a mainsupporting-plate for the apparatus, a pattern xed to said plate and astripping-plate surrounding the pattern, said plates being in movableengagement one with the other.

2. A portable, reversible molding apparatus comprising a mainsupporting-plate, apattern fixed to said plate, a stripping-platesurrounding such pattern and guide-pins extending between said platesfor controlling the shift of said supporting-plate to draw the patterns.

3. Aportable, reversible molding apparatus comprising a mainsupporting-plate for the apparatns,a pattern fixed to said plate,astripping-plate surrounding such pattern and in movable engagement with saidsupportingplate, guides fixed to one of said plates and means fixed tothe other of said-plates engaging said guides.

4. A portable, reversible molding apparatus comprising a mainsupporting-plate, a pattern fixed to said plate, a stripping-platesurrounding such pattern and in movable engagement said stripping-plate,means on said supporting-plate engaging said guides and stops fixed tosaid guides for limiting the movement of said supporting-plate indrawing the pattern.

5. A portable, reversible molding apparatus comprising a main supporting-plate, a pattern fixed to said plate, a stri pping-platesurrounding such pattern and in movable engagement with saidsupporting-plate and a draft-handle rigidly secured to saidsupporting-plate for drawing the pattern by hand.

6. A reversible moldin g apparatus comprising a fiat, reversiblestripping-plate adapted to fit over the open side of the flask and hav-Aing an opening therein through which the pattern is projected, a fiatpattern-supporting plate mounted upon and reversible with saidstripping-plate, said pattern-supporting plate extending over theopening in said stripping-plate and being movable to and from the sameto draw the pattern and laterallyprojecting guides extending betweensaid plates whereon said pattern-supportin g plate is shifted at rightangles to said strippingplate to draw the pattern.

7. A reversible molding apparatus comprising a fiat, reversiblestripping-plate adapted to fit over the openl side of the fiask andhaving an opening therein through which the pattern is projected, a flatpattern-supporting plate mounted upon, extending over the openingthereinand reversible with said stripping-plate, a pattern fixed to saidsupporting-plate and extending through the opening in saidstripping-plate, guides extending between said plates whereon saidpattern-supportingplate is shifted to draw the pattern.

8. A reversible molding apparatus comprising a fiat, reversiblestripping-plate adapted to fit over the open side of the flask andhaving an opening therein through which the pattern is projected, a fiatpattern-supporting plate mounted upon and reversible with saidstripping-plate and normally held against its face, a pattern fixed tosaid supportingplate and extending through the opening in saidstripping-plate, said supporting-plate being adapted to hold thepatterns rigidly in position during the ramming operation and beingshiftably mounted upon said strippingplate to draw the patterns.

9. A reversible molding apparatus comprising a fiat, reversiblestripping-plate adapted to fit over the open side of the flask andhaving an opening therein through which the Ywith said supporting-plate,guides fixed to IOO IIO

pattern is projected, a pattern supporting plate mounted upon andreversible with said stripping-plate, means for guiding saidpattern-plate at right angles to and from said stripping-plate and adraft-handle rigidly secured to said supporting-plate for drawing thepatterns by hand.

10. A reversible molding apparatus comprising a fiat,reversiblestripping-plate adapted to t over the open side of the flask and havingan opening therein through which the pattern is projected, a flatpattern-supporting plate mounted upon and reversible with saidstripping-plate, said pattern-supporting plate extending over theopeningin said stripping-plate and movable to and from the same to drawthe pattern, projecting guides fixed to said stripping-plate and meanson said supporting-plate engaging said guides to insure right-linemovement of said supportingplate as it is shifted to draw the pattern.

11. A reversible molding apparatus comprising a fiat, reversiblestripping-plate adapted to t over the open side of the flask and havingan opening therein through which the pattern is projected, a datpattern-supporting plate mounted upon and reversible with saidstripping-plate, said pattern-supporting plate extending over theopening in said stripping-plate and movable to and from the same to drawthe pattern, projecting guides fixed to said stripping-plate, means onsaid supporting-plate engaging said ,guides and stops on said guides forlimiting the move- `ment of said su pporting-plate asit is shifted todraw the pattern.

12. A molding apparatus comprising a resaid stripping-plate and adaptedto fit Within the opening therein and a saidv mount.

13. A molding apparatus comprising a flat, reversible stripping-plateadapted to fit over the open side of the flask and having an openingtherein through which the pattern is projected, a pattern-supportingplate mounted on and reversible With said stripping-plate and extendingover said opening, said pattern-supporting plate having acentralbodilyremovahle section, a pattern fixed to said section and means forguiding said pattern-supporting plate as it is shifted to draw the pattern.

14. A molding apparatus comprisinga flat, reversible stripping-plateprovided with a central, bodily-removable section having an openingtherein through which the pattern is projected, and pattern supportingplate mounted upon and reversible with said stripping-plate andextending over said opening and means for guiding said pattern-supportas it is shifted to draw a pattern.

WILLIAM S. WOOD.

pattern fixed to Witnesses:

GEO. P. FISHER, Jr., BEN. E. HARRIS.

